MemberStack

If you're building a Webflow site that requires logins, paywalled content, or tiered access, you'll need to bring in a dedicated membership layer. Webflow discontinued its native Memberships feature in 2024, and Memberstack has become the standard solution for adding authentication and subscriptions to Webflow projects.

You design everything in Webflow (forms, buttons, gated sections) and Memberstack binds membership logic to those elements using data-ms- attributes, without requiring a separate frontend. This guide covers three ways to set up the integration, from the no-code app to direct API workflows.

How to integrate Memberstack with Webflow

What is Memberstack? Memberstack is a membership platform that adds user authentication, subscription billing, and gated content to websites. It provides customizable login forms, Stripe-powered payments, tiered access control, and member management dashboards; all configured through data attributes on your existing site elements.

Memberstack connects to Webflow through three independent methods:

• The official Webflow app for no-code setup
• Code Embed elements and custom attributes for manual configuration
• Memberstack's APIs for programmatic member management and third-party sync

Most production sites combine two or more of these depending on the complexity of the membership flows they need to support.

Install the Memberstack app

Install the Memberstack app from the Webflow Apps Marketplace to connect your Webflow project to Memberstack without writing any code. The app handles script injection automatically and lets you apply data-ms- attributes to forms, buttons, and content sections directly from the Apps panel.

To set up the integration:

1. Find and install the Memberstack app in the Webflow Apps Marketplace
2. Authorize Memberstack and select the Webflow project you want to link
3. Open the project in Webflow and click the puzzle icon to launch the Apps panel
4. Select any element on the canvas to view, add, or remove Memberstack attributes

The app comes with access to Memberstack's component library: 500+ pre-built Webflow components with data-ms- attributes already configured.

If you're starting a new project, Memberstack also provides a cloneable Webflow starter theme with a CMS structure and pre-built e-commerce pages — faster than starting from a blank canvas, especially for teams new to the attribute system.

The app is the recommended starting point. It removes the need to manually paste scripts and keeps attributes in sync as the product updates.

Add custom attributes and script to Webflow manually

If you prefer to configure the integration without the app or need to customize how the Memberstack script loads, you can add it manually through Webflow's custom code in the head and body tags.

To install the Memberstack script, go to Site Settings > Custom Code in Webflow and paste your personalized install code in the Head Code section. Copy it directly from the Install Code section of your Memberstack dashboard — the snippet is pre-filled with your app ID and the correct script URL, so there is no need to construct it manually.

Once the script is installed, authentication forms use standard Webflow form elements with data-ms- attributes applied in the Element Settings panel:

• Apply data-ms-form="signup" to form blocks to turn them into Memberstack signup forms
• Add data-ms-member="email" to email inputs and data-ms-member="password" to password fields
• Use data-ms-modal="login" on buttons to trigger Memberstack's pre-built login modal

Content gating works by applying visibility attributes to any Webflow element. Add data-ms-content="members" to hide elements from non-members, data-ms-content="!premium" to show upgrade prompts to members not on a premium plan, and data-ms-member="name" to display member data inline.

Payment integration connects through Stripe using two core attributes:

• data-ms-price:add="PRICE_ID" creates a checkout button linked to a specific Stripe price
• data-ms-action="customer-portal" gives members access to their billing management page

This method gives you more control over script loading behavior and is useful for performance tuning on sites where the Memberstack script affects page load scores.

Build with Memberstack's APIs

Integrating Webflow and Memberstack through their APIs enables custom authentication flows, automated member provisioning, and data synchronization with external systems. This approach requires developer resources and suits teams that need programmatic control over member experiences or need to connect Memberstack to an existing backend.

The API ecosystem has three main components: 

• The DOM package for frontend JavaScript interactions
• The Admin REST API for server-side operations
• Webflow webhooks for real-time event routing

To automate member provisioning, for example, creating members when users complete a purchase or register through a third-party form, configure a server endpoint to receive the trigger, then call the Admin API to create the member:

curl -X POST "https://admin.memberstack.com/v1/members" \

  -H "X-API-KEY: sk_live_..." \

  -d '{"email": "user@example.com", "password": "temp123", "customFields": {"source": "webinar"}}'

From there, you can assign plans automatically and sync the member ID to the Webflow CMS for use on profile pages or collection list templates.

For dynamic member dashboards, use the DOM package's getCurrentMember() method to fetch member data on the frontend, then query related Webflow CMS content based on member preferences or plan.

The updateMemberJSON() method lets you write progress, bookmarks, or settings back to the member record — useful for course platforms or tools that track per-member state.

Memberstack also supports single sign-on (SSO) across domains through OAuth endpoints at https://auth.memberstack.com/authorize. This lets members authenticate once and move between domains without having to log in again. However, SSO requires a Memberstack Business plan or higher.

The Webflow API is useful for syncing Memberstack member data back into Webflow CMS collections, for example, updating a member directory when a member's profile changes, or triggering a CMS item when a new member joins.

What can you build with the Memberstack Webflow integration?

Memberstack gives Webflow sites a full membership layer (authentication, payments, gated content, and member data) without requiring a separate frontend or backend system. The integration is flexible enough to cover everything from simple password-protected pages to multi-tiered SaaS applications.

Here are a few examples of what you can build:

• Educational platforms with gated lessons: Build course sites where video content, downloadable resources, and quizzes unlock based on membership tier, with automated enrollment emails and progress tracked per member using updateMemberJSON().
• Digital agency client portals: Create branded workspaces where clients access project files, view invoices, and communicate with teams through member-only sections, with Memberstack webhooks syncing status changes to your project management tools.
• Creator communities with exclusive content: Build fan sites that offer backstage content, early releases, and direct messaging between creators and premium members, using social login options to reduce signup friction.
• Job boards with dual-sided access: Design platforms where employers post listings behind a paywall and job seekers create profiles through member dashboards, with plan-based visibility controlling which features each side can access.

To get started, install the Memberstack app from the Webflow Apps Marketplace.

If you're building API-driven workflows, the Memberstack Admin REST API docs and the Webflow API reference cover the endpoints you'll need.